jura s9 power shuts off after grinding coffee

I have jura s9 coffee esspresso machine,when i first start it up it will go through the procedures or rince and grind ,but then shuts down the display just goes blank ,after that it does not cooperate at all till I let it sit awhile,I cant blame the grinder, that seems to work,the pump seems to work too .

I can make it work when I use pre ground coffee,but not always i dot think this unit has a self resetting fuse but I could be wrong.